Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Wiseco Piston Kit 3.875 in. Bore 10.5:1 Compression Ratio Harley-Davidson Twin Cam 103 2011-2016 K2792
WISECO
$524.95Experience enhanced performance and durability with the WISECO Piston Kit K2792. Engineered with advanced manufacturing techniques, these pistons provide exceptional strength and reduced thermal expansion, making them ideal for high-performance...09101999- SKU:
- 09101999
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- BORE - OVERSIZE:
- 0,125'
- BORE OVERSIZE - IMPERIAL:
- 0.125'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- MODEL:
- VM SERIES
- PISTON HEAD SHAPE:
- POSITIVE
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$524.95 -
Wiseco Piston Kit 103 Cubic Inch 2007-2017 K2793
WISECO
$524.95Experience unparalleled performance with the WISECO Piston Kit K2793, designed for high efficiency and durability. This kit features advanced manufacturing techniques that enhance strength and minimize thermal expansion, ensuring optimal engine...09102001- SKU:
- 09102001
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- BORE - OVERSIZE:
- 0,125'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM
- BORE OVERSIZE - IMPERIAL:
- 0.125'
- MODEL:
- VM SERIES
- DISPLACEMENT:
- 103'
- PISTON HEAD SHAPE:
- POSITIVE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE IMPERIAL:
- 3.875'
- UNITS:
- KIT
$524.95 -
Wiseco Piston Kit 1984-1999 Harley-Davidson Big Twin 1340cc K1675
WISECO
$409.95Upgrade your engine's performance with the WISECO Piston Kit Big Twin K1675, crafted from a high-silicon aluminum alloy for exceptional strength and reliability. This comprehensive kit includes everything you need for a successful overbore or top-end...K1675- SKU:
- K1675
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- +0,005'
- BORE SIZE IMPERIAL:
- 3.503'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 1342 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
$409.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-104W
REVOLUTION PERFORMANCE, LLC
$495.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...09106370- SKU:
- 09106370
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 98'
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-105W
REVOLUTION PERFORMANCE, LLC
$495.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...09106371- SKU:
- 09106371
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4'
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 98'
- UNITS:
- KIT
$495.95 -
EMGO Crankcase Filter Kit 14-20910
EMGO
$10.60High-quality crankcase breathers and filters from Emgo1420910- SKU:
- 1420910
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- FEATURES:
- RUBBER-TOP
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- EACH
- PRODUCT NAME:
- VENT FILTER
$10.60 -
EMGO Replacement Filter - Chrome 14-20905
EMGO
$11.94For use only with crankcase vent filter1420905- SKU:
- 1420905
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FILTER
- UNITS:
- EACH
$11.94 -
EMGO Crankcase Filter Kit 14-20900
EMGO
$22.40High-quality crankcase breathers and filters from Emgo1420900- SKU:
- 1420900
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- FEATURES:
- WITH CHROME BASE
- PRODUCT NAME:
- VENT FILTER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- EACH
$22.40 -
EMGO Oil Filter - Chrome 10-82442
EMGO
$16.50Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1082440- SKU:
- 1082440
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- COLOR/FINISH:
- CHROME
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- STREET
- TYPE:
- SPIN-ON
- BASE COLOR:
- SILVER
- PRODUCT NAME:
- OIL FILTER
- UNITS:
- EACH
$16.50 -
EMGO Oil Filter - Chrome 10-82400
EMGO
$12.04Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1082400- SKU:
- 1082400
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- TYPE:
- SPIN-ON
- COLOR/FINISH:
- CHROME
- BASE COLOR:
- SILVER
- FILTER MEDIA MATERIAL:
- PAPER
- UNITS:
- EACH
$12.04 -
EMGO Drop-In Oil Filter with Seals 10-28300
EMGO
$7.23Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1028300- SKU:
- 1028300
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- SILVER
- FILTER MEDIA MATERIAL:
- PAPER
- UNITS:
- EACH
- TYPE:
- DROP-IN
- RIDING STYLE:
- STREET
$7.23 -
EMGO Oil Filter - Chrome 10-07800
EMGO
$12.04Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1007800- SKU:
- 1007800
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- BASE COLOR:
- SILVER
- PRODUCT NAME:
- OIL FILTER
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- SPIN-ON
- COLOR/FINISH:
- CHROME
$12.04 -
EMGO Oil Filter - Black 10-07700
EMGO
$8.31Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1007700- SKU:
- 1007700
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- BASE COLOR:
- BLACK
- FILTER MEDIA MATERIAL:
- PAPER
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- TYPE:
- SPIN-ON
$8.31 -
EMGO Oil filter 10-28310
EMGO
$6.53Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer07120409- SKU:
- 07120409
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- SILVER
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- DROP-IN
- COLOR/FINISH:
- ORANGE
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- RIDING STYLE:
- STREET
$6.53 -
COMETIC Head Gasket - 4"- .040" C9880
COMETIC
$61.90Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load...09340010- SKU:
- 09340010
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE:
- 4,000'
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Head Gasket - SSW - +4.125" - .027" C9930
COMETIC
$61.90Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle. Made in the U.S.A.09340031- SKU:
- 09340031
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.69 MM
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- BORE SIZE:
- 4,125'
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,69 MM (0,027')
- THICKNESS IMPERIAL:
- 0,027'
- UNITS:
- PAIR
$61.90 -
COMETIC Head Gasket SSW+4.125.030 C9931
COMETIC
$61.90Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle. Made in the U.S.A.09340032- SKU:
- 09340032
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- PAIR
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Head Gasket - SSW - +4.125" - .036" C9932
COMETIC
$61.90Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle. Made in the U.S.A.09340033- SKU:
- 09340033
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.91 MM
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,91 MM (0,036')
- TYPE:
- CYLINDER HEAD
- BORE SIZE:
- 4,125'
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,036'
$61.90 -
COMETIC Head Gasket - SSW - +4.125" - .040" C9933
COMETIC
$61.90Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle. Made in the U.S.A.09340034- SKU:
- 09340034
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE:
- 4,125'
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- LAYERED STEEL
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Base Gasket - +4.125" - .020" C9936
COMETIC
$33.55High quality products for long-term reliability, Manufactured from premium fuel-resistant materials, Viton gaskets feature a stainless steel core with a .001" thick coating of Viton rubber on both sides, Made in the U.S.A.09340036- SKU:
- 09340036
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
$33.55
